Sofa



FIG. 1 is a front elevation view of a sofa showing our new design;

FIG. 2 is a rear elevation view of the embodiment of FIG. 1;

FIG. 3 is a left, side elevation view of the embodiment of FIG. 1;

FIG. 4 is a front elevation view of a second embodiment of the sofa depicted in FIG. 1;

FIG. 5 is a back elevation view of the embodiment of FIG. 4; and,

FIG. 6 is a left, side elevation view of the embodiment of FIG. 4.

The broken line disclosure is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a sofa, as shown and described. 